Pressure-indicator.



' A. lSCHINKEZ.

PnEssynE momma. APPLICATION FILED JULY 31.1916. 1,227,080. Patented May 22, 1917.

3 iE-lill UNITED STATESl PATENT OFFICE.4

ALBERT SCHINKEZ, OF CHARLOTTE, MICHIGAN, ASSIGNOR TO HARRY W. HANCOCK,

OF CHARLOTTE, MICHIGAN.

PRESSURE-INDICATOR.

Specification of Letters Patent.

Patented May 22, 1917.

Application led July 31, 1916. Serial No. 112,386.

This invention relates to a device for indicating whether or not a fluid-conducting l system, as, for example, a system for supplying oil to the bearings of an automobile power plant, is under pressure.

In the accompanying drawings, FigureJ 1 is a front elevation of an indicator embodying the features of my invention. Fig. 2 is a vertical central sectional -view taken in the plane of dotted line 2 of Fig. 1. Fig. 3 is a section on dotted line 3 3 of Fi 2. Fig. 4 is a view taken in the plane of otted line 4-4 of Fig. 2. In Figs. 1 to 4 inclusive, the parts are in the same position. Fig. 5 is a view similar to that of Fig..4, but showing the parts in position indicating that the system is under pressure. l

The indicator may be located and supported in any suitable place or manner. Herein I have shown the indicator as located upon the dash A. The indicator comprises a circular case 1 having a rear wall 2 and a front wall 3. Adjacent to the rear wall 2 is a partition 4 spaced slightly away from said rear wall. Between the wall 2 and the partition 4 is a diaphragm 5, the periphery of which has a fluid-tight connection with the casing. The space between the rear wall 2 and the diaphragm 5 communicates with the oiling system or other Huid-conducting system in any suitable manner, as by means of a tube 6.

A rocking indicator member 7 formed from an integral piece of sheet metal and comprising the alined pivots 8 and 9 is pivotally supported in any suitable manner within the space between the front wall 3 and the partition 4. Herein the ends of the pivots 8 and I9 are shown as pointed andas lying within sockets or bearings 10 in the peripheral portion of the case 1. The rock ing member 7 comprises two arms 11 and12"l extending forwardly from the pivots 8 and 9, said arms supporting a plate 13 which may, as herein shown, be curved upon the arc of a `circle concentric with the pivots 8 and 9. In the front wall 3 is a sight-opening 14 through which a portion of the outer surface of the plate 13 is visible. On said plate may be placed any suitable indications, as, for example, the words Off and On When the rocking member 7 is in the position indicated in Fig. 4, the word Cif is vlsible through the sight-opening 14. When the rocking member is in the position shown 1n Fig. 5, the word On may be read through said sight-opening.

The. `means for rocking the member 7 comprises an arm 15 extending from the pivot 8 in the direction opposite to the arms 11 and 12. One end of a spring arm 16 is sultably connected to the partition 4. The free end of the arm 16 normally bears agamst the arm 15 and thus holds the rocking member in the position shown in Figs. 1 to. 4, inclusive. Means is provided for moving the arm 16 to the opposite side of the pivot 10 in order that said arm shall bear against thearm 1l as shown in Fig. 5 and thus vcause the rocking member to assume the position shown in said figure. The means referred to includes the diaphragm 5 and a stud or projection 17 interposed be- 'tween the diaphragm and the arm 16, said stud extending freely through an opening in the partition 4. Pivotal movement of the rocking member 7 is limited by engagement of the lugs 18 with the partition 4.

The sight opening 14 is covered by a glass disk 19 held in contact with the front wall 3 by means of a ianged ring 20 which is' secured to the case 1 by any suitable means, as, for example, by soldering, said ring being adapted to be secured to the dash A or any other suitable support by means of screws 21 or the like.

When the system with which the tube 6 communicates is under pressure, the diaphragm 5 holds the arm 16 at the forward side of the pivot 8 and hence in contact with the arm l1 as shown in Fig. 5, whereby the member 7 is held in such position as to display the word On through the said opening 14. As soon as the pressure is removed yor materially lowered, the arm 16 (by reavention is not limited to the construction and arrangement of parts herein disclosed as various modlflcations may be made within the scope of the appended claims.

. I` claim as my invention:

1. A pressureindicator having, in combination, a casecomprising 'a front wall, a rea-i' wall and an intermediate partition, said partition having an opening therethrough, an indicator member plvotally supported in the space between the front wall and the partition, said member having arms extending from opposite sides of the axis of said member, a springarm secured to the partition, the free end of said arm being arranged to bear against either of the iirst mentioned 4 arms, a diaphragm in the space between the rear wall and the partition, and a stud between the. diaphragm and the spring arm, said stud extending throu h the opening in the partition, the front wa l having an opening through which a portion of the indicator member is visible.

2. A pressure indicator having, in com-- bination, a case, a sheet-metal indicator member within said case, said member cornprising two alined pivots, two arms extendmg in one direction from said pivots, an indication-bearing plate connected to said arms, and a third arm extending in the opposite direction from one of the irst mentioned arms, aspring arm secured in the case, the free end of said arm being arranged to bear against either the third arm or one of the first mentioned' arms, and a diaphragm in said case arranged to move said spring arm from the third arm to one of said first mentioned arms.

3. A pressure indicator having, in combination, a case, a pivot, two armsY extending in opposite directions from said pivot, an

arm secured in the Case, the free end of said arm being arranged to bearagainst either of the first mentioned arms, a dlaphragm in said case arranged to move said arm from site sides of the axis of said member, a sprmg arm arranged to b ear against either of said first mentioned arms, and a pressureresponsive member arranged rto `move said spring arm from one of the lfirst mentioned arms to the other.l

5. A pressure indicator having, in combination, two oppositely-extendin arms, a

` spring arm arranged to bear against either of sald first mentioned arms, a pressure-responsive member arranged` to move said spring arm from one of the firstmentioned arms Vto the'other, and an indicating device operable by said arms.

6: A pressure indicator having, in combinatlon, a Acase havlng a sight opening thereto be seen and too small to permit two indications to be seen at the same time, said plate being pivotally supported within the case behind the sight opening, a pressure-responsive device, and connections between said device and the plate for rocking the latter..

In testimony whereof, I havehereunto set my hand. y l

VALBERT SCHINKEZ.I 

